Of A Mine Off-road Vehicle Ride Comfort

This study has investigated a mining off-road explosion-proof vehicle which is used to carry personnel and some important equipment working in mining areas and mines According to the low standard of the road surface under the mine which has more bending and slanding road and shorter turning radius, the vehicle has to steer and brake frequently, bearing long-term full-loaded, vibration and impact load, all these make the working condition of the mine car poor. In order to ensure the comfort of the driver and passengers and to avoid the damage of the equipment caused by vibration during driving, the ride comfort research is necessary for the mining off-road vehicles.The mining off-road vehicles has been predigested to a three-dimensional model with seven freedoms, and the dynamics mathematics model equation of ride comfort performance has been built using the theory of mutibody dynamics. The model and equation provide thorey sustention to reducing the vibration of vehicle.During the research of a car's ride comfort, getting the correct random road input excitation is a very important premise. There are a variety of methods to generate road-roughness time-domain-model and harmonic-super position-method is a simple, intuitive and rigorous math-based one. In this study, the time-domain-model of random road-roughness is constructed and the national standards D-level road's random surface model is simulated based on harmonic-superposition-method to supply an excitation accord with the reality for ride comfort simulation and analyses.To get the parameters for Establishing a vehicle model such as geometric, inertial, tire parameters and stiffness, damping of suspension etc. form design parameters and some other technical datum like CAD model. Establishing a vehicle model including systems of multi-link suspension, steering, brakes, tires, body etc in systemic dynamics analyze software ADAMS/Car according to parameters.By referring to data and thorey calculate to confirm the parameters for silulation, by changing the load, speed, suspension stiffness, suspension damping, tire stiffness and other factors that affect vehicle ride comfort to making simulations. With analyzing the change rule of acceleration of center of mass, makes a improvement scheme on ride comfort performance, mainly about spring stiffness and tire radial stiffness.